Fossil wood

Short description: Wood preserved in the fossil record

Petrified softwood

Fossil wood of Tamil Nadu

Fossil wood from the Pliocene in Thirvakkarai, Tamil Nadu

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Fossil wood, also known as fossilized tree, is wood that is preserved in the fossil record. Over time the wood will usually be the part of a plant that is best preserved (and most easily found). Fossil wood may or may not be petrified, in which case it is known as petrified wood or petrified tree. The study of fossil wood is sometimes called palaeoxylology, with a "palaeoxylologist" somebody who studies fossil wood.

The fossil wood may be the only part of the plant that has been preserved, with the rest of the plant completely unknown:[1] therefore such wood may get a special kind of botanical name. This will usually include "xylon" and a term indicating its presumed (not necessarily certain) affinity, such as Araucarioxylon (wood similar to that of extant Araucaria or some related genus like Agathis or Wollemia), Palmoxylon (wood similar to that of modern Arecaeae), or Castanoxylon (wood similar to that of modern chinkapin or chestnut tree).[2]

## Contents

* 1 Types
* 1.1 Petrified wood
* 1.2 Mummified wood
* 1.3 Submerged forests
* 2 See also
* 3 References

## Types

### Petrified wood

Main page: Biology:Petrified wood

Petrified wood are fossils of wood that have turned to stone through the process of permineralization.[3] All organic materials are replaced with minerals while maintaining the original structure of the wood.

The most notable example is the petrified forest in Arizona.[4]

### Mummified wood

Mummified wood are fossils of wood that have not permineralized.[5] They are formed when trees are buried rapidly in dry cold or hot environments. They are valued in paleobotany because they retain original cells and tissues capable of being examined with the same techniques used with extant plants in dendrology.[6]

Notable examples include the mummified forests in Ellesmere Island[7] and Axel Heiberg Island.[8]

### Submerged forests

Main page: Biology:Submerged forest

Submerged forests are remains of trees submerged by marine transgression. They are important in determining sea level rise since the last glacial period.[9]

## See also

* Amber
* Dendrochronology
* Paleobotany
* Xyloid lignite

## References

1. ↑ Ed Strauss (2001). "Petrified Wood from Western Washington". http://www.edstrauss.com/pwoodfx.html.
2. ↑ Wilson Nichols Stewart; Gar W. Rothwell (1993). Paleobotany and the evolution of plants (2 ed.). Cambridge University Press. p. 31. ISBN 978-0-521-38294-6. https://books.google.com/books?id=Fhm-oed74JgC&q=naming+fossil+wood.
3. ↑ Bersama, CV Karya. "Frequently Asked Questions Regarding Petrified Wood" (in en-GB). https://karyabersama.com/frequently-asked-questions-regarding-petrified-wood/.
4. ↑ "Petrified Forest National Park". National Park Service, US Department of the Interior. http://www.nps.gov/pefo/index.htm.
5. ↑ Kelly Greig (January 17, 2011). "Mummified Forest Shows Effect of Changing Climate". Canadian Geographic. http://www.canadiangeographic.ca/blog/posting.asp?ID=414.
6. ↑ Thomas N. Taylor; Edith L. Taylor; Michael Krings (2009). Paleobotany: the biology and evolution of fossil plants. Academic Press. p. 33. ISBN 978-0-12-373972-8. https://archive.org/details/paleobotanysecon00tayl_312.
7. ↑ "Science: Unearthing a Frozen Forest". Time. September 22, 1986. http://www.time.com/time/magazine/article/0,9171,962379-1,00.html.
8. ↑ Jeremy Hsu (December 16, 2010). "2-million-year-old 'mummy trees' reveal harsh climate". NBC News. http://www.nbcnews.com/id/40707755.
9. ↑ Eric Charles Frederick Bird (2008). Coastal geomorphology: an introduction. John Wiley and Sons. p. 52. ISBN 978-0-470-51729-1. https://books.google.com/books?id=-YX0mWBpjGkC&q=submerged+forest.

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